1.1 本规范涵盖适用于煤矿粉尘的粉状石灰石，以降低煤尘爆炸风险。 注1: 粉状石灰石可作为煤矿作业中不燃材料的来源。将石灰石以足够的量撒在煤表面，以使煤尘、岩屑、其他粉尘和水分的混合不可燃含量不低于80 % 所有松散粉尘（MSHA 30 CFR 75.403）。由于石灰石不可燃材料的浓度如此之高，粉尘爆炸无法从附近的气体爆炸中引发或传播。石灰石必须基本干燥，才能令人满意地除尘。 1.2 以国际单位表示的数值视为标准值。本标准不包括其他计量单位。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers pulverized limestone suitable for use as dust in coal mines to reduce risk of coal dust explosions. Note 1: Pulverized limestone can serve as a source of incombustible material in coal mine operations. Limestone is dusted onto coal exposures in sufficient amount so that the incombustible content of the combined coal dust, rock dust, other dust, and moisture shall not be less than 80 % of all loose dust (MSHA 30 CFR 75.403). With such a concentration of limestone incombustible material, dust explosions cannot initiate or be propagated from nearby gas explosions. The limestone must be substantially dry in order to dust satisfactorily. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.